Spray-nozzle.



J. A. JOHNSTON.

SPRAY NOZZLE.

APPLICATION FILED JAN. l7. l9l6.

1,230,487. Patented June 19, 1917.

FFIQE.

JOHN A. JOHNSTON, OF SPRINGFIELD, 'MASSACI-IUSETTS.

SPRAY-NOZZLE.

Specification of Letters Patent.

Patented June 19, 1917.

Application filed January 17, 1916. Serial No. 72,433.

To all whom it may concern:

Be it known that I, JOHN A. JOHNSTON, a citizen of the United States,residing at Springfield, in the county of Hampden and State ofMassachusetts, have invented a new and useful Spray-Nozzle,of which thefollowing is a specification.

This invention relates to a nozzle for use in spraying heavy liquidsthat have to be sprayed in a molten or heated condition. Ordinarily thevalves which are used for spraying these liquids are likely to getclogged up when not in use on account of the liquid hardening in thepassages and ports thereof. v

The principal objects of this invention are to provide a construction ofnozzle in which the liquid will flow through the openings of the valvewhen the latter is .in closed condition, thus keeping them always freeand preventing the hardening of the liquid in the passages; to providemeans whereby during spraying a bypass will be provided so as to supplya valve further along in the system; and to provide means whereby thevalve is held to its seat in a simple and eflicient manner.

Reference is to be had to the accompanying drawings, in which Figure lis an elevation of a series of valves showingtheir application to onesystem of spraying;

Fig. 2 is a sectional view on the line 22 of Fig. 1.

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Figs. 3 and 4 are sectional views on the line 34 of Fig. 2 showing thevalve in two different positions; 7

Fig. 5 is an end view looking into the valve casing;

Fig. 6 is a view of the opposite end of the valve;

Fig. 7 is a plan of a system of piping showing another way in which thisinven tion can be applied; and

Fig. 8 is a sectional view similar to. Fig. 3 showing a modified form ofvalve for use with this system.

Referring first to the first six figures, the invention is shown in aform in which the heavy coal tar or other liquid to be sprayed is passedthrough a pipe 10 and through a series of valves arranged at intervalsalong said pipe. In this system the liquid has to go through one valvebefore it reaches another. They are, so to speak, in series. In thiscase each valve comprises a casing having a conical part 11 which has aninlet passage 12 and an outlet passage 13, preferably diametricallyopposite. Between these two is a passage'l. A by-pass 15 is shown of asemi-circular form extending from the passage 12 to the passage 13.

lVithin this casing is a conical valve 16 which is provided with anopening 17' for spraying which communicates with an interior space ofthe valve by'means of two fine ports 18 for spraying. The interior ofthe valve iscut away to form a rear passage 19 which extendssubstantially across the valve, but an abutment or apron 20. is shownstopping this passage at a certain point. The bypass 15 is not quite,but nearly, of the same area in cross section as the two passages 12 and13. V o

These parts are so arranged that the valve can be turned to twopositions indicated in Figs. 3 and/l respectively. In the former ofthese positions the opening 17 registers with the passage 14 and liquidissprayed out under pressure in two fine streams. The abutment 20 servesto prevent direct pas sage of the liquid through the inlet 12 to theoutlet 13, but some'can pass out to supply the next valve. In theposition shown in Fig. 4 the valve is turned so as to cut off thepassage 14, but at the same time the opening 17 is made. to registerwith the inlet passage 12. In this way the liquid coming through. thisvalve and passing along'to the neXt one through the outlet 13 has apassage through the ports 18 and also through the bypass 15v so that thevalves I along the line can be supplied in either position ofthis valve,and the ports 18 arekept clear by theconstant-fiow of liquid throughthem.

Further features of construction are shown in Figs. 2 and'6. The valve16 is provided with an axial projection 21 of a non-circular crosssection, in this case shown square. On the valve casing 11 is a cap 22which has projections 23 looking under lugs 24 on the casing when thecap is turned to certain positions for the purpose of holding the capsecurely in place. The cap is provided with a socket receiving andfitting the projection 21 and with a non-circular end 25 so that awrench or handle 26 can be applied to it to operate the cap 22 and consequently the valve. This cap is provided with a screw 27 for holdingthe valve to its conical seat.

In the form shown in Figs. 7 and S the system is what may be calledmultiple. In this case there is a supply pipe 30 and a paralleldischarge pipe 31. These are connected by a number of parallel pipes 32in each of which is a valve casing 11. In this case the valves are ofthe same form as shown in the first six figures with the exception ofthe elimination of the bypass 13. In this case it is not necessary toallow suflicient liquid to pass through the valve when closed to supplyanother valve, and consequently no bypass is required. But neverthelessthe liquid passes through the ports 18 and keeps them free no matterwhether the valve is open or closed.

Although I have illustrated and described only certain forms of theinvention I am aware of the fact that modifications can be made thereinby any person skilled in the art without departing from the scope of theinvention as eXpressed in the claims. Theretore I do not wish to belimited to all the details of construction herein shown and described,but what I do claim is 1. In a nozzle for use in spraying heavy moltenmaterials, the combination with a casing having three passages throughits walls, two flow passages and a discharge passage between them, of avalve fitting in said casing and having a jet spray opening for sprayingthrough said discharge passage, and a passage communicating with saidopening and extending through the valve, said passage in the valve beingarranged to form a bypass for conducting the liquid through the nozzlefrom .one side to the other at all times when said opening is closed.

2. In a nozzle for use in spraying heavy molten materials, thecombination with a casing having two passages through its wallsconstituting the inlet and outlet, and a third passage between them, ofa valve fitting in said casing and having a passage therethrough, anopening for spraying ex tending from said passage in the valve andadapted to register with the third passage in the valve casing, saidpassage in the valve being arranged to register with the inlet openingin the valve casing when said open- Copies of this patent may beobtained for five ings register with the third passage thereof and toregister with either the inlet or outlet passage in the valve casingwhen said opening for spraying is turned to inoperative position or intoregister with the other of said passages.

3. In a nozzle of the class described, the combination of a casinghaving an inlet passage at one side and an out-let passage at theopposite side, a bypass extending from the inlet passage to the outletpassage in the wall of the casing around one half the same, and athirdpassage on the opposite side of the casing between the inlet and outletpassages, with a valve in said casing provided with a rear passageadapted to connect the inlet and outlet passages of the casing when thevalve is turned to a certain position and provided with a pair ofconverging passages terminating in a port on the outer side of saidvalve for registering with the third passage in the casing when saidvalve is turned to one position, said valve having means for closing thethird passage when it is turned to a position in which said portsregister with the inlet passage, whereby the liquid will be permitted toflow through the valve when the said third passage is closed.

4.. As an article of manufacture, a spraying nozzle having a passage forproducing a spray, a valve in said nozzle and constituting a partthereof, said nozzle having means for permitting the circulation ofliquid therethrough when the valve is moved to such position as toprevent spraying through said spray passage, and means for preventingthe clogging up of said spray passage by directing liquid therethroughwhen not delivering a spray.

5. As an article of manufacture, a spray nozzle for spraying heavyliquids comprising a casing having an opening for spraying, anoscillatable valve for opening and closing said opening having a spraypassage and means for preventing the clogging up of said spray passagewhen said opening is closed.

In testimony whereof I have hereunto set In hand.

y JOHN A. JOHNSTON.

cents each, by addressing the Commissioner of Patents,

Washington, D. C.

